public class Zuoye6 {
    public static void main(String[] args) {
        double a=3.2,b=14,c=0.076,d=0.019;
        int count=1;
        for(count=1;;count++)
        {
            a+=a*(1+c);
            b+=b*(1+d);
            if(a>b)
                break;
        }
        System.out.println(count);
    }
}
